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. 2008 Mar 28;100(12):128304.
doi: 10.1103/PhysRevLett.100.128304. Epub 2008 Mar 28.

Aging, yielding, and shear banding in soft colloidal glasses

S A Rogers  1 , D Vlassopoulos, P T Callaghan
Affiliations

Aging, yielding, and shear banding in soft colloidal glasses

S A Rogers et al. Phys Rev Lett. .

Abstract

Soft colloidal interactions in colloidal glasses are modeled using suspensions of multiarm star polymers. Using a preshearing protocol that ensures a reproducible initial state ("rejuvenation" of the system), we report here the evolution of the flow curve from monotonically increasing to one dominated by a stress plateau, demonstrating a corresponding shear-banded state. Phenomenological understanding is provided through a scalar model that describes the free-energy landscape.

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